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Caught these two in flagrante the other day and it reminded of something Theo mentioned re male pulvilli. In this case clearly much larger on the male; is this a general rule or are there too many exceptions, and why doesn't it appear to be mentioned in the keys I'm using?

photographed 24/78/2009; Devon, England

Thanks

Tim

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Certainly looks like Voria to me too :)

I am guessing that the larger pulvilli on males would tend to show up better on live specimens than the dead material that keys are based on, but that might just be a wild guess. It just serves as a handy field-tool when it is less easy to look at parafrontal bristles or ask the flies if they'd mind showing their wobbly bits ;)

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Hi Tim

It is a general rule with exceptions.

I formulated it as a one-way implication

IF the pulvilli are clearly elongated, it is a male


Theo

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Useful to know, thanks Theo.

Tim